Endobronchial Ultrasound Guided Transbronchial Needle Aspiration (EBUS -TBNA) is commonly
performed for diagnosis of mediastinal pathologies. The procedure can either be performed
under general anaesthesia or under moderate sedation with topical anaesthesia. Most patients
tolerate the procedure well although cough is often reported as a distressing symptom.
Topical lignocaine is administered during bronchoscopy for local anaesthesia. There is no
literature on the efficacy of lower concentrations (1%) versus a higher (2%) during EBUS
TBNA. This study would help to determine whether 1% lignocaine is as effective as 2%
lignocaine for airway anaesthesia during EBUS-TBNA.